ODROID-M1: dts/dtbo: Introduce device tree overlay

Comes with the first DTBO file, fanspeed-full.dts

Signed-off-by: Steve Jeong <how2soft@gmail.com>
Signed-off-by: Deokgyu Yang <secugyu@gmail.com>
Change-Id: I1e3c18d026b1ebdd9d80a7b23b383b15d568fc42

scripts/Makefile.dtbinst

@@ -18,17 +18,22 @@ include $(srctree)/scripts/Kbuild.include
 include $(src)/Makefile
 
 dtbs    := $(addprefix $(dst)/, $(dtb-y) $(if $(CONFIG_OF_ALL_DTBS),$(dtb-)))
+dtbos    := $(addprefix $(dst)/, $(dtbo-y) $(if $(CONFIG_OF_ALL_DTBS),$(dtbo-)))
 subdirs := $(addprefix $(obj)/, $(subdir-y) $(subdir-m))
 
-__dtbs_install: $(dtbs) $(subdirs)
+__dtbs_install: $(dtbs) $(dtbos) $(subdirs)
 	@:
 
+# Helper targets for Installing DTBs into the boot directory
 quiet_cmd_dtb_install = INSTALL $@
       cmd_dtb_install = install -D $< $@
 
 $(dst)/%.dtb: $(obj)/%.dtb
 	$(call cmd,dtb_install)
 
+$(dst)/%.dtbo: $(obj)/%.dtbo
+	$(call cmd,dtb_install)
+
 PHONY += $(subdirs)
 $(subdirs):
 	$(Q)$(MAKE) $(dtbinst)=$@ dst=$(patsubst $(obj)/%,$(dst)/%,$@)

scripts/Makefile.lib

@@ -338,7 +338,8 @@ DTC_FLAGS += -Wno-unit_address_vs_reg \
 	-Wno-graph_child_address \
 	-Wno-simple_bus_reg \
 	-Wno-unique_unit_address \
-	-Wno-pci_device_reg
+	-Wno-pci_device_reg \
+	--symbols
 endif
 
 ifneq ($(findstring 2,$(KBUILD_EXTRA_WARN)),)
@@ -393,6 +394,17 @@ endef
 $(obj)/%.dt.yaml: $(src)/%.dts $(DTC) $(DT_TMP_SCHEMA) FORCE
 	$(call if_changed_rule,dtc,yaml)
 
+quiet_cmd_dtco = DTCO    $@
+cmd_dtco = mkdir -p $(dir ${dtc-tmp}) ; \
+	$(CPP) $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \
+	$(DTC) -@ -H epapr -O dtb -o $@ -b 0 \
+		-i $(dir $<) $(DTC_FLAGS) \
+		-d $(depfile).dtc.tmp $(dtc-tmp) ; \
+	cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile)
+
+$(obj)/%.dtbo: $(obj)/%.dts FORCE
+	$(call if_changed_dep,dtco)
+
 dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp)
 
 # Bzip2